Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 12 of 12 for “"excitation energy transfer"”.
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Charge and excitation-energy transfer in time-dependent density functional theory
… the mechanisms and pathways of charge and excitation-energy transfer of natural molecular complexes is a promising approach for the tailored design of new artificial energy-converting materials. Therefore, next to extensive experimental investigations, a theoretical method that is able to …
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Computational simulations of excitation energy transfer and electron transfer in biological systems
Exploring excitation energy and electron transfer in proteins and other macromolecules is key to understanding many vital biological processes. In acquiring a deeper conceptualization of electron and excitation energy transfer pathways in a breadth of biological environments, we gain the ability to …
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Quantum dynamics in condensed phases : charge carrier mobility, decoherence, and excitation energy transfer
In this thesis, we develop analytical models for quantum systems and perform theoretical investigations on several dynamical processes in condensed phases. First, we study charge-carrier mobilities in organic molecular crystals, and develop a microscopic theory that describes both the coherent …
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Dynamics and spectra in condensed phases : single molecule spectroscopy, electron transfer, and excitation energy transfer
… is developed for the non-adiabatic electron transfer reactions, which allows a unified treatment of diverse kinetic regimes in the electron transfer process. The method is applied to electron transfer reactions in mixed-valence systems in order to explore the possibility of electronic …
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Nanoparticle-nanoparticle interactions and light-matter interaction studied by simulated absorption spectroscopy
… plasmon interactions, plasmon-induced excitation energy transfer, and excited state dynamics of molecular plasmons are goals of this thesis. Utilizing efficient tight-binding calculations, the absorption spectra of homodimer and heterodimer nanoparticles are explored. Then, …
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Excitation evolution and self-regulation ability of photosynthetic light-harvesting systems /
In this dissertation, excitation energy transfer in photosynthetic light-harvesting systems is studied together with the self-regulatory molecular mechanisms utilized by plants to quickly adopt to the varying environment conditions. These mechanisms, known as non-photochemical quenching, allow …
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Sužadinimo evoliucija ir savireguliacijos geba fotosintetinėse šviesą surenkančiose sistemose /
In this dissertation, excitation energy transfer in photosynthetic light-harvesting systems is studied together with the self-regulatory molecular mechanisms utilized by plants to quickly adopt to the varying environment conditions. These mechanisms, known as non-photochemical quenching, allow …
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Two-dimensional Spectroscopy of Molecular Excitons in a Model Dimer System
… preparation in 2D spectroscopy by using shaped excitation pulses. In experiments on the model dimer we observe strong oscillating off-diagonal features in the 2D spectra which are present only before the onset of dephasing, which occurs in less than 100 fs due to strong system-bath coupling. …
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Heterogeneity of photosystem II as it occurs in domain specific regions of the thylakoid membrane of spinach (spinacia oleracia L.)
… fraction to characterize and gain insight into excitation energy transfer and primary electron transport in PSlla and PSII~ centres. The results presented here clearly illustrate the widely held notions of PSII/PS·I and PSlIa/PSII~ spatial separation. This study suggests that chlorophyll …
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Growth by radio frequency sputtering and characterisation of rare earth doped wide bandgap oxides
… the doped films allows the understanding of the excitation energy transfer process between the matrix to the ion, where self-trapped excitons can be involved. To conclude this study, the doped films were tested as down-shifter layers onto a Si-solar cell where they gave promising results. They …
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Luminescent Harnessing of 2D Transition Metal Dichalcogenide Excitons
… many-body phenomena. 2D excitons may be transferred to other emissive materials in a heterostructure system. This has applications in e.g., photon harvesting with luminescent solar concentrators (LSCs). Newly prepared monolayers are however susceptible to chalcogen atom vacancies, which …
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Light Harvesting and Energy Transfer in Metal-Organic Frameworks
… and carotenoids) that capture solar energy and direct it towards the reaction centers of photosystems I and II. Highlighted by highly-ordered crystal structures and synthetic tunability via crystal engineering, metal–organic frameworks (MOFs) have the potential to mimic the natural …